Valve puller



Patented Nov. 13, 1923.

* than rein.

SAMUEL S. BURMAN, OF TIFFIN, OHIO.

VALVE FULLER.

Application filed August 31, 1922.

T 0 all whom it may concern Be it known that I, SAMUEL S. BURMAN, a citizen of the United States, residing at Tiffin, in the county of Seneca and State of Ohio, have invented new and useful Improvements in Valve Pullers, of which the following is a specification.

The present invention relates to improvements in devices for removing lower valves from oil wells and consists in the novel construction, combination and arrangement of parts set forth in and falling within the scope of the appended claims.

In the'drawings there has been illustrated a preferred embodiment of my improvement, but it is to be understood that I do not wish to be restricted to the precise structural details therein illustrated.

In the drawings:

Figure l is a side elevation of'my improvements showing the same in position upon the upper or working valve as well as on the lower and stationary valve of an oil well.

Figure 2 is a detail longitudinal sectional view of the improvement.

As is well known in the art the cylinder of an oil well is provided with two valves, the bottom, or standing valve, as it is termed is stationary, and co-acts with the upper valve which is reciprocatory. It is often necessary to remove these valves for various causes and the removal is ordinarily accomplished by drawing out the upper valve by its connecting rod and inserting a threaded rod within the barrel or cylinder. This rod after contacting with the lower valve is turned until its screw engages with the threads provided upon the lower valve when the lower valve can be withdrawn from the well. This operation obviously requires time and labor as well as causing a great delay in the work. The rods are also subjected to extra wear, the joints of the rods becoming liable to breakage and machinery. rigs, etc. brought into use to accomplish this purpose.

I overcome the above recited objections by providing a simple and eflective pulling device which is arranged between the upper and lower valve. This pulling device comprises an upper member 1 which is attached to the upper valve 2. The member 1 is hollow and comprises two separate bores 3 and 4, the upper bore being enlarged and threaded and communicates with the lower reduced Serial No. 585,566.

threaded bore 1. The member 1 has its lower face provided with ratchet teeth 5, the same being adapted to co-operate with similar teeth 6 provided upon the lower section of the pulling device which is designated by the numeral 7. This section is also hollow and has its lower extremity provided with threads 8, while the upper interior of the said section is smooth. A stud9 is employed, the said stud having both its lower end and its center threaded, as at 10 and 11. The upper threads 10 of the stud 9 are of a size adapted to engage with the threads 4 and 8 of the members 1 and 7. The upper end of the stud is threaded as at 9.

In placing the valves in the well the stud has its threaded portion 11 engaged with the threaded bore provided in the upper portion of the lower or standing valve 12,

the threads 10 engaging with the threads 8 ot .the lower section 7 of the pulling device. The standing valve is then inserted within the well. The section 1 has its threads 3 engaging with co-acting threads provided upon the upper valve 2, and the said valve is also fastened. to the operating rod and inserted within the well. When it is desired to remove the valves from the well the upper valve is lowered until the teeth 5 of the upper member of the pulling device are brought into engagement with the teeth of the lower member 7 of the said pulling ,device. The upper valve, as well as the upper section of the pulling device, is then rotated until the threaos 10 of the stud 9 become disengaged from the threads 8 of the lower section 7 which allows the lower section 7 to drop upon the lower valve 12 and permits of the threads 4 of the upper section 1 of the pulling device engaging with the threads 10 of the stud, and whereby both the upper and the lower valves may be removed simultaneously without injuring the pulling device or without the employment of special ma chinery for accomplishing this purpose.

The teeth 5 and 6. are of the form generally known as ratchet teeth, that is to say, each tooth has an end surface which is radially disposed with relation to the member upon which the tooth is mounted and a side surface which is spirally disposed on the member. Therefore the said radially disposed surfaces positively engage each other when the member 1 is turned in one direction and the spirally disposed surfaces of the two members frictionally engage each other when the member 1 is turned in an opposite direction. The member 7 when not in engagement with the thread 10 0f the stud 9 and when in the well and subjected to the upward flow or pressure of the liquid is held up so that its upper end is above the threads 11 of the stud 9. Consequently the member 1 may be lowered so that the teeth of the two members 1 and 7 engage each other. Then by turning the member 1 so that the spirally disposed surface of the teeth 5 and 6 frictionally engage each other the member 7 is forced in an upward direction by the pressure f the fluid in the well and the thread of the member 7 engages the thread 10 at the upper end of thestud 9. The thread 8 does not extend to the extreme lower end of the member 7 as most clearly shown in Figure-2, consequently when the lower end of the thread 8 arrives at the lower end of the thread 10 the member 7 will come to a state of rest notwithstanding the member 1 may continue to rotate as above described, for the spiral surfaces of the teeth 5 will ride or pass over the spiral surfaces of the teeth 6. When the member 1 is rotated so that the radially disposed surfaces of the teeth 5 engage the radially disposed surfaces of the teeth 6, the thread 8 of member 7 is unscrewed from the thread 10 of the stud 9 but the thread 4 in the member 1 does not engage the thread 10 of the stud 9 until after the thread 8 has completely disengaged the same. Therefore it is impossible for the threads 4 and 8 to be in engagement with the thread 10 at the same time and the members 1 and 7 cannot become wedged or stuck on the stud 9.

If for any reason, the parts could not be connected together to permit the removal of the valves then the rods and upper valve 12 with the member 1 can be pulled from the well, an ordinary socket attached to the rods and then the rods lowered and the socket screwed to stud 9 by means of the threads 9'. Then the lower valve can be pulled from the well, thus rendering it unnecessary to pull the tubing.

hat I claim is 1. A valve pulling device comprising a stud provided with a thread, a member having an opening which receives the stud, said member being provided at the lower portion of the opening with a thread adapted to engage the thread upon the stud, the surface of the said opening above the thread of said member being of a vertical length greater than the vertical length of the thread on the stud, said member having teeth located at its upper end, a sectional member provided at its lower end with teeth adapted to engage teeth of the first mentioned member, the last mentioned member having a thread adapted to engage the thread upon the stud.

2. A. valve pulling device comprising a stud provided with a thread, a member havin. an opening which receivesthe stud, said 'member being provided at the lower portion of the opening with a thread which terminates short of the lower end of the member and which is adapted to engage the thread upon the stud. said member having at its upper end teeth provided with radially and s irally disposedsurfaces,a second member rovided. at its lower end with teeth having radially and spirally disposed surfaces adapted to engage the teeth of the first mentioned member. the last mentioned member having a thread adapted to engage the thread of the stud.

3. A valve pulling device comprising a stud provided with a thread, a member having an opening which receives the stud, said member being provided at the lower portion of the opening witha thread which terminates short of the lower end of the member and which is adapted to engage the thread upon the stud, said member having at its upper end teeth provided with radially and spirally disposed surfaces, a second member provided at its lower end with teeth having radially and spirally disposed surfaces adapted to engage the teeth of the first mentioned member. the last mentioned member having a thread adapted to engage the thread of the stud. said stud having threads at its upper end which are adapted to be engaged by an ordinary socket so that the lower valve can be pulled after the upper valve and its attached parts have been removed from the well.-

In testimony whereof I afliX my signature.

SAMUEL S. BURMAN. 

